1 /* 2 * Copyright (c) 2000-2005 Silicon Graphics, Inc. 3 * All Rights Reserved. 4 * 5 * This program is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU General Public License as 7 * published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope that it would be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write the Free Software Foundation, 16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 17 */ 18 #ifndef __XFS_MOUNT_H__ 19 #define __XFS_MOUNT_H__ 20 21 typedef struct xfs_trans_reservations { 22 uint tr_write; /* extent alloc trans */ 23 uint tr_itruncate; /* truncate trans */ 24 uint tr_rename; /* rename trans */ 25 uint tr_link; /* link trans */ 26 uint tr_remove; /* unlink trans */ 27 uint tr_symlink; /* symlink trans */ 28 uint tr_create; /* create trans */ 29 uint tr_mkdir; /* mkdir trans */ 30 uint tr_ifree; /* inode free trans */ 31 uint tr_ichange; /* inode update trans */ 32 uint tr_growdata; /* fs data section grow trans */ 33 uint tr_swrite; /* sync write inode trans */ 34 uint tr_addafork; /* cvt inode to attributed trans */ 35 uint tr_writeid; /* write setuid/setgid file */ 36 uint tr_attrinval; /* attr fork buffer invalidation */ 37 uint tr_attrset; /* set/create an attribute */ 38 uint tr_attrrm; /* remove an attribute */ 39 uint tr_clearagi; /* clear bad agi unlinked ino bucket */ 40 uint tr_growrtalloc; /* grow realtime allocations */ 41 uint tr_growrtzero; /* grow realtime zeroing */ 42 uint tr_growrtfree; /* grow realtime freeing */ 43 } xfs_trans_reservations_t; 44 45 #ifndef __KERNEL__ 46 47 #define xfs_daddr_to_agno(mp,d) \ 48 ((xfs_agnumber_t)(XFS_BB_TO_FSBT(mp, d) / (mp)->m_sb.sb_agblocks)) 49 #define xfs_daddr_to_agbno(mp,d) \ 50 ((xfs_agblock_t)(XFS_BB_TO_FSBT(mp, d) % (mp)->m_sb.sb_agblocks)) 51 52 #else /* __KERNEL__ */ 53 54 struct xlog; 55 struct xfs_inode; 56 struct xfs_mru_cache; 57 struct xfs_nameops; 58 struct xfs_ail; 59 struct xfs_quotainfo; 60 61 #ifdef HAVE_PERCPU_SB 62 63 /* 64 * Valid per-cpu incore superblock counters. Note that if you add new counters, 65 * you may need to define new counter disabled bit field descriptors as there 66 * are more possible fields in the superblock that can fit in a bitfield on a 67 * 32 bit platform. The XFS_SBS_* values for the current current counters just 68 * fit. 69 */ 70 typedef struct xfs_icsb_cnts { 71 uint64_t icsb_fdblocks; 72 uint64_t icsb_ifree; 73 uint64_t icsb_icount; 74 unsigned long icsb_flags; 75 } xfs_icsb_cnts_t; 76 77 #define XFS_ICSB_FLAG_LOCK (1 << 0) /* counter lock bit */ 78 79 #define XFS_ICSB_LAZY_COUNT (1 << 1) /* accuracy not needed */ 80 81 extern int xfs_icsb_init_counters(struct xfs_mount *); 82 extern void xfs_icsb_reinit_counters(struct xfs_mount *); 83 extern void xfs_icsb_destroy_counters(struct xfs_mount *); 84 extern void xfs_icsb_sync_counters(struct xfs_mount *, int); 85 extern void xfs_icsb_sync_counters_locked(struct xfs_mount *, int); 86 extern int xfs_icsb_modify_counters(struct xfs_mount *, xfs_sb_field_t, 87 int64_t, int); 88 89 #else 90 #define xfs_icsb_init_counters(mp) (0) 91 #define xfs_icsb_destroy_counters(mp) do { } while (0) 92 #define xfs_icsb_reinit_counters(mp) do { } while (0) 93 #define xfs_icsb_sync_counters(mp, flags) do { } while (0) 94 #define xfs_icsb_sync_counters_locked(mp, flags) do { } while (0) 95 #define xfs_icsb_modify_counters(mp, field, delta, rsvd) \ 96 xfs_mod_incore_sb(mp, field, delta, rsvd) 97 #endif 98 99 /* dynamic preallocation free space thresholds, 5% down to 1% */ 100 enum { 101 XFS_LOWSP_1_PCNT = 0, 102 XFS_LOWSP_2_PCNT, 103 XFS_LOWSP_3_PCNT, 104 XFS_LOWSP_4_PCNT, 105 XFS_LOWSP_5_PCNT, 106 XFS_LOWSP_MAX, 107 }; 108 109 typedef struct xfs_mount { 110 struct super_block *m_super; 111 xfs_tid_t m_tid; /* next unused tid for fs */ 112 struct xfs_ail *m_ail; /* fs active log item list */ 113 xfs_sb_t m_sb; /* copy of fs superblock */ 114 spinlock_t m_sb_lock; /* sb counter lock */ 115 struct xfs_buf *m_sb_bp; /* buffer for superblock */ 116 char *m_fsname; /* filesystem name */ 117 int m_fsname_len; /* strlen of fs name */ 118 char *m_rtname; /* realtime device name */ 119 char *m_logname; /* external log device name */ 120 int m_bsize; /* fs logical block size */ 121 xfs_agnumber_t m_agfrotor; /* last ag where space found */ 122 xfs_agnumber_t m_agirotor; /* last ag dir inode alloced */ 123 spinlock_t m_agirotor_lock;/* .. and lock protecting it */ 124 xfs_agnumber_t m_maxagi; /* highest inode alloc group */ 125 uint m_readio_log; /* min read size log bytes */ 126 uint m_readio_blocks; /* min read size blocks */ 127 uint m_writeio_log; /* min write size log bytes */ 128 uint m_writeio_blocks; /* min write size blocks */ 129 struct xlog *m_log; /* log specific stuff */ 130 int m_logbufs; /* number of log buffers */ 131 int m_logbsize; /* size of each log buffer */ 132 uint m_rsumlevels; /* rt summary levels */ 133 uint m_rsumsize; /* size of rt summary, bytes */ 134 struct xfs_inode *m_rbmip; /* pointer to bitmap inode */ 135 struct xfs_inode *m_rsumip; /* pointer to summary inode */ 136 struct xfs_inode *m_rootip; /* pointer to root directory */ 137 struct xfs_quotainfo *m_quotainfo; /* disk quota information */ 138 xfs_buftarg_t *m_ddev_targp; /* saves taking the address */ 139 xfs_buftarg_t *m_logdev_targp;/* ptr to log device */ 140 xfs_buftarg_t *m_rtdev_targp; /* ptr to rt device */ 141 __uint8_t m_blkbit_log; /* blocklog + NBBY */ 142 __uint8_t m_blkbb_log; /* blocklog - BBSHIFT */ 143 __uint8_t m_agno_log; /* log #ag's */ 144 __uint8_t m_agino_log; /* #bits for agino in inum */ 145 __uint16_t m_inode_cluster_size;/* min inode buf size */ 146 uint m_blockmask; /* sb_blocksize-1 */ 147 uint m_blockwsize; /* sb_blocksize in words */ 148 uint m_blockwmask; /* blockwsize-1 */ 149 uint m_alloc_mxr[2]; /* max alloc btree records */ 150 uint m_alloc_mnr[2]; /* min alloc btree records */ 151 uint m_bmap_dmxr[2]; /* max bmap btree records */ 152 uint m_bmap_dmnr[2]; /* min bmap btree records */ 153 uint m_inobt_mxr[2]; /* max inobt btree records */ 154 uint m_inobt_mnr[2]; /* min inobt btree records */ 155 uint m_ag_maxlevels; /* XFS_AG_MAXLEVELS */ 156 uint m_bm_maxlevels[2]; /* XFS_BM_MAXLEVELS */ 157 uint m_in_maxlevels; /* max inobt btree levels. */ 158 struct radix_tree_root m_perag_tree; /* per-ag accounting info */ 159 spinlock_t m_perag_lock; /* lock for m_perag_tree */ 160 struct mutex m_growlock; /* growfs mutex */ 161 int m_fixedfsid[2]; /* unchanged for life of FS */ 162 uint m_dmevmask; /* DMI events for this FS */ 163 __uint64_t m_flags; /* global mount flags */ 164 uint m_dir_node_ents; /* #entries in a dir danode */ 165 uint m_attr_node_ents; /* #entries in attr danode */ 166 int m_ialloc_inos; /* inodes in inode allocation */ 167 int m_ialloc_blks; /* blocks in inode allocation */ 168 int m_inoalign_mask;/* mask sb_inoalignmt if used */ 169 uint m_qflags; /* quota status flags */ 170 xfs_trans_reservations_t m_reservations;/* precomputed res values */ 171 __uint64_t m_maxicount; /* maximum inode count */ 172 __uint64_t m_resblks; /* total reserved blocks */ 173 __uint64_t m_resblks_avail;/* available reserved blocks */ 174 __uint64_t m_resblks_save; /* reserved blks @ remount,ro */ 175 int m_dalign; /* stripe unit */ 176 int m_swidth; /* stripe width */ 177 int m_sinoalign; /* stripe unit inode alignment */ 178 int m_attr_magicpct;/* 37% of the blocksize */ 179 int m_dir_magicpct; /* 37% of the dir blocksize */ 180 __uint8_t m_sectbb_log; /* sectlog - BBSHIFT */ 181 const struct xfs_nameops *m_dirnameops; /* vector of dir name ops */ 182 int m_dirblksize; /* directory block sz--bytes */ 183 int m_dirblkfsbs; /* directory block sz--fsbs */ 184 xfs_dablk_t m_dirdatablk; /* blockno of dir data v2 */ 185 xfs_dablk_t m_dirleafblk; /* blockno of dir non-data v2 */ 186 xfs_dablk_t m_dirfreeblk; /* blockno of dirfreeindex v2 */ 187 uint m_chsize; /* size of next field */ 188 struct xfs_chash *m_chash; /* fs private inode per-cluster 189 * hash table */ 190 atomic_t m_active_trans; /* number trans frozen */ 191 #ifdef HAVE_PERCPU_SB 192 xfs_icsb_cnts_t __percpu *m_sb_cnts; /* per-cpu superblock counters */ 193 unsigned long m_icsb_counters; /* disabled per-cpu counters */ 194 struct notifier_block m_icsb_notifier; /* hotplug cpu notifier */ 195 struct mutex m_icsb_mutex; /* balancer sync lock */ 196 #endif 197 struct xfs_mru_cache *m_filestream; /* per-mount filestream data */ 198 struct delayed_work m_reclaim_work; /* background inode reclaim */ 199 struct delayed_work m_eofblocks_work; /* background eof blocks 200 trimming */ 201 __int64_t m_update_flags; /* sb flags we need to update 202 on the next remount,rw */ 203 struct shrinker m_inode_shrink; /* inode reclaim shrinker */ 204 int64_t m_low_space[XFS_LOWSP_MAX]; 205 /* low free space thresholds */ 206 207 struct workqueue_struct *m_data_workqueue; 208 struct workqueue_struct *m_unwritten_workqueue; 209 struct workqueue_struct *m_cil_workqueue; 210 struct workqueue_struct *m_reclaim_workqueue; 211 struct workqueue_struct *m_log_workqueue; 212 struct workqueue_struct *m_eofblocks_workqueue; 213 } xfs_mount_t; 214 215 /* 216 * Flags for m_flags. 217 */ 218 #define XFS_MOUNT_WSYNC (1ULL << 0) /* for nfs - all metadata ops 219 must be synchronous except 220 for space allocations */ 221 #define XFS_MOUNT_WAS_CLEAN (1ULL << 3) 222 #define XFS_MOUNT_FS_SHUTDOWN (1ULL << 4) /* atomic stop of all filesystem 223 operations, typically for 224 disk errors in metadata */ 225 #define XFS_MOUNT_DISCARD (1ULL << 5) /* discard unused blocks */ 226 #define XFS_MOUNT_RETERR (1ULL << 6) /* return alignment errors to 227 user */ 228 #define XFS_MOUNT_NOALIGN (1ULL << 7) /* turn off stripe alignment 229 allocations */ 230 #define XFS_MOUNT_ATTR2 (1ULL << 8) /* allow use of attr2 format */ 231 #define XFS_MOUNT_GRPID (1ULL << 9) /* group-ID assigned from directory */ 232 #define XFS_MOUNT_NORECOVERY (1ULL << 10) /* no recovery - dirty fs */ 233 #define XFS_MOUNT_DFLT_IOSIZE (1ULL << 12) /* set default i/o size */ 234 #define XFS_MOUNT_32BITINODES (1ULL << 14) /* do not create inodes above 235 * 32 bits in size */ 236 #define XFS_MOUNT_SMALL_INUMS (1ULL << 15) /* users wants 32bit inodes */ 237 #define XFS_MOUNT_NOUUID (1ULL << 16) /* ignore uuid during mount */ 238 #define XFS_MOUNT_BARRIER (1ULL << 17) 239 #define XFS_MOUNT_IKEEP (1ULL << 18) /* keep empty inode clusters*/ 240 #define XFS_MOUNT_SWALLOC (1ULL << 19) /* turn on stripe width 241 * allocation */ 242 #define XFS_MOUNT_RDONLY (1ULL << 20) /* read-only fs */ 243 #define XFS_MOUNT_DIRSYNC (1ULL << 21) /* synchronous directory ops */ 244 #define XFS_MOUNT_COMPAT_IOSIZE (1ULL << 22) /* don't report large preferred 245 * I/O size in stat() */ 246 #define XFS_MOUNT_FILESTREAMS (1ULL << 24) /* enable the filestreams 247 allocator */ 248 #define XFS_MOUNT_NOATTR2 (1ULL << 25) /* disable use of attr2 format */ 249 250 251 /* 252 * Default minimum read and write sizes. 253 */ 254 #define XFS_READIO_LOG_LARGE 16 255 #define XFS_WRITEIO_LOG_LARGE 16 256 257 /* 258 * Max and min values for mount-option defined I/O 259 * preallocation sizes. 260 */ 261 #define XFS_MAX_IO_LOG 30 /* 1G */ 262 #define XFS_MIN_IO_LOG PAGE_SHIFT 263 264 /* 265 * Synchronous read and write sizes. This should be 266 * better for NFSv2 wsync filesystems. 267 */ 268 #define XFS_WSYNC_READIO_LOG 15 /* 32k */ 269 #define XFS_WSYNC_WRITEIO_LOG 14 /* 16k */ 270 271 /* 272 * Allow large block sizes to be reported to userspace programs if the 273 * "largeio" mount option is used. 274 * 275 * If compatibility mode is specified, simply return the basic unit of caching 276 * so that we don't get inefficient read/modify/write I/O from user apps. 277 * Otherwise.... 278 * 279 * If the underlying volume is a stripe, then return the stripe width in bytes 280 * as the recommended I/O size. It is not a stripe and we've set a default 281 * buffered I/O size, return that, otherwise return the compat default. 282 */ 283 static inline unsigned long 284 xfs_preferred_iosize(xfs_mount_t *mp) 285 { 286 if (mp->m_flags & XFS_MOUNT_COMPAT_IOSIZE) 287 return PAGE_CACHE_SIZE; 288 return (mp->m_swidth ? 289 (mp->m_swidth << mp->m_sb.sb_blocklog) : 290 ((mp->m_flags & XFS_MOUNT_DFLT_IOSIZE) ? 291 (1 << (int)MAX(mp->m_readio_log, mp->m_writeio_log)) : 292 PAGE_CACHE_SIZE)); 293 } 294 295 #define XFS_LAST_UNMOUNT_WAS_CLEAN(mp) \ 296 ((mp)->m_flags & XFS_MOUNT_WAS_CLEAN) 297 #define XFS_FORCED_SHUTDOWN(mp) ((mp)->m_flags & XFS_MOUNT_FS_SHUTDOWN) 298 void xfs_do_force_shutdown(struct xfs_mount *mp, int flags, char *fname, 299 int lnnum); 300 #define xfs_force_shutdown(m,f) \ 301 xfs_do_force_shutdown(m, f, __FILE__, __LINE__) 302 303 #define SHUTDOWN_META_IO_ERROR 0x0001 /* write attempt to metadata failed */ 304 #define SHUTDOWN_LOG_IO_ERROR 0x0002 /* write attempt to the log failed */ 305 #define SHUTDOWN_FORCE_UMOUNT 0x0004 /* shutdown from a forced unmount */ 306 #define SHUTDOWN_CORRUPT_INCORE 0x0008 /* corrupt in-memory data structures */ 307 #define SHUTDOWN_REMOTE_REQ 0x0010 /* shutdown came from remote cell */ 308 #define SHUTDOWN_DEVICE_REQ 0x0020 /* failed all paths to the device */ 309 310 /* 311 * Flags for xfs_mountfs 312 */ 313 #define XFS_MFSI_QUIET 0x40 /* Be silent if mount errors found */ 314 315 static inline xfs_agnumber_t 316 xfs_daddr_to_agno(struct xfs_mount *mp, xfs_daddr_t d) 317 { 318 xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d); 319 do_div(ld, mp->m_sb.sb_agblocks); 320 return (xfs_agnumber_t) ld; 321 } 322 323 static inline xfs_agblock_t 324 xfs_daddr_to_agbno(struct xfs_mount *mp, xfs_daddr_t d) 325 { 326 xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d); 327 return (xfs_agblock_t) do_div(ld, mp->m_sb.sb_agblocks); 328 } 329 330 /* 331 * perag get/put wrappers for ref counting 332 */ 333 struct xfs_perag *xfs_perag_get(struct xfs_mount *mp, xfs_agnumber_t agno); 334 struct xfs_perag *xfs_perag_get_tag(struct xfs_mount *mp, xfs_agnumber_t agno, 335 int tag); 336 void xfs_perag_put(struct xfs_perag *pag); 337 338 /* 339 * Per-cpu superblock locking functions 340 */ 341 #ifdef HAVE_PERCPU_SB 342 static inline void 343 xfs_icsb_lock(xfs_mount_t *mp) 344 { 345 mutex_lock(&mp->m_icsb_mutex); 346 } 347 348 static inline void 349 xfs_icsb_unlock(xfs_mount_t *mp) 350 { 351 mutex_unlock(&mp->m_icsb_mutex); 352 } 353 #else 354 #define xfs_icsb_lock(mp) 355 #define xfs_icsb_unlock(mp) 356 #endif 357 358 /* 359 * This structure is for use by the xfs_mod_incore_sb_batch() routine. 360 * xfs_growfs can specify a few fields which are more than int limit 361 */ 362 typedef struct xfs_mod_sb { 363 xfs_sb_field_t msb_field; /* Field to modify, see below */ 364 int64_t msb_delta; /* Change to make to specified field */ 365 } xfs_mod_sb_t; 366 367 extern int xfs_log_sbcount(xfs_mount_t *); 368 extern __uint64_t xfs_default_resblks(xfs_mount_t *mp); 369 extern int xfs_mountfs(xfs_mount_t *mp); 370 371 extern void xfs_unmountfs(xfs_mount_t *); 372 extern int xfs_mod_incore_sb(xfs_mount_t *, xfs_sb_field_t, int64_t, int); 373 extern int xfs_mod_incore_sb_batch(xfs_mount_t *, xfs_mod_sb_t *, 374 uint, int); 375 extern int xfs_mount_log_sb(xfs_mount_t *, __int64_t); 376 extern struct xfs_buf *xfs_getsb(xfs_mount_t *, int); 377 extern int xfs_readsb(xfs_mount_t *, int); 378 extern void xfs_freesb(xfs_mount_t *); 379 extern int xfs_fs_writable(xfs_mount_t *); 380 extern int xfs_sb_validate_fsb_count(struct xfs_sb *, __uint64_t); 381 382 extern int xfs_dev_is_read_only(struct xfs_mount *, char *); 383 384 extern void xfs_set_low_space_thresholds(struct xfs_mount *); 385 386 #endif /* __KERNEL__ */ 387 388 extern void xfs_mod_sb(struct xfs_trans *, __int64_t); 389 extern int xfs_initialize_perag(struct xfs_mount *, xfs_agnumber_t, 390 xfs_agnumber_t *); 391 extern void xfs_sb_from_disk(struct xfs_sb *, struct xfs_dsb *); 392 extern void xfs_sb_to_disk(struct xfs_dsb *, struct xfs_sb *, __int64_t); 393 394 extern const struct xfs_buf_ops xfs_sb_buf_ops; 395 396 #endif /* __XFS_MOUNT_H__ */ 397